MANUAL OF THE GRASSES OF THE UNITED STATES 



349 



Figure 487. — Agrostis howellii. Panicle, X 1; glumes and floret, X 5. (Type.) 



near the base an exserted bent awn 

 about 6 mm. long; palea obsolete. 

 % — Known only from Oregon 

 (Multnomah and Hood River Coun- 

 ties). 



29. Agrostis hiemalis (Walt.) B. 

 S. P. (Fig. 488.) Culms mostly 30 to 

 40 cm. tall, erect in small tufts, gla- 

 brous; blades crowded toward the 

 base in a dense cluster, 3 to 5 cm. 

 long, less than 1 mm. wide, flat or 

 subfiliform; panicles fragile, the slen- 

 der filiform branches in rather distant 

 whorls, widely spreading or drooping, 

 unbranched below the middle, spike- 

 let-bearing only at the ends of the 

 branchlets; spikelets 1.5 to 1.7 mm. 

 long, clustered, short-pediceled, ap- 

 pressed; glumes subequal, acute, sca- 

 brous on the keels; lemma 1 to 1.2 

 mm. long, the callus glabrous; anthers 

 0.2 mm. long. % — Open ground, 

 fields, and waste places, Massachu- 

 setts to Florida, west to Wisconsin, 

 Kansas, Oklahoma, and Texas. 



30. Agrostis scabra Willd. (Fig. 

 489.) Culms 30 to 85 cm., rarely to 

 100 cm., tall, erect in small dense 

 tufts; sheaths shorter than the inter- 

 nodes, glabrous; ligule hyaline, 2 to 5 

 mm. long; blades flat, 8 to 20 cm. 

 long, 1 to 3 mm. wide, scabrous, the 

 basal ones often subfiliform; panicles 

 15 to 25 cm. long, rarely longer, the 



brittle scabrous branches in rather 

 distant verticils, ascending or spread- 

 ing, sometimes drooping, branching 

 above the middle; spikelets 2 to 2.7 

 mm. long, loosely arranged at the 

 ends of the branchlets; glumes un- 

 equal, acuminate, scabrous on the 

 keels; lemma 1.5 to 1.7 mm. long, dis- 

 tinctly longer than the caryopsis, the 

 callus sparsely pilose; anthers 0.4 to 

 0.5 mm. long. % — Mountain 

 meadows, fields, and open woods, 

 Newfoundland and Alaska, south to 

 Florida, Texas, and California; prob- 

 ably introduced in the Southern 

 States. (Included in A. hiemalis in 

 Manual, ed. 1,) 



Agrostis scabra var. geminata 

 (Trin.) Swallen. Branches of panicle 

 short and divaricate; lemma awned 

 or awnless. The type specimen, from 

 Alaska, is awned; a large number of 

 specimens over a wide range agree in 

 other respects, but are awnless. % 

 — At high latitudes and altitudes, 

 Newfoundland to Alaska, south to 

 New Hampshire, North Dakota, Col- 

 orado, and California. 



31. Agrostis idahoensis Nash. 

 Idaho redtop. (Fig. 490.) Culms 

 slender, tufted, 10 to 30 cm. tall; 

 leaves mostly basal, the blades nar- 

 row; panicle loosely spreading, 5 to 

 10 cm. long, the branches capillary, 



